Your AI sourdough coach
Better bread,
every bake.
Plan it, time it, bake it. Then decode your crumb and see what to change next loaf.
Detected structure
Fool's Crumb (Under-fermented)
Pro tip for next time
Extend your bulk fermentation. Instead of watching the clock, wait for a 30-50% increase in dough volume and a light, jiggly texture before shaping.
Plan backwards
Bread by breakfast.
Pick when you want it. We time every step backwards.
Ready by
7:30AM
Plan · Attempt 4
Beginner's loaf
When should the bread be ready?
Day
Time
Assuming 75°F / 24°C
Your plan · Starts today 2:05 PM
We'll notify you when each step is ready.
Guided baking
Never miss
a fold.
Every step timed to your kitchen's temperature.
Beginner's loaf
Baking · 0m · Started 1:46 PM
Rest, then stretch & fold
Room 75°F · Rise target 50%
watch the rise
Do this
Move the dough to a straight-sided container so you can measure the rise, and mark the starting level. Three sets of stretch and folds: the first after 30 minutes, then two more 45 minutes apart. Leave it alone after the last fold. End bulk on the rise and the feel, not the clock.
Last time · Attempt 3
5h 15m at 77°F / 25°C, +60% · crumb Even, open alveoli, “Best one yet. Keep the dough at 77°F.”
Try it: pause the timer, add time, or mark the fold done.
Compare your bakes
From dense
to open.
Compare your bakes and see exactly what made the difference.
Bake 2
25% rise · 71°F
Bake 3
60% rise · 77°F
| Showing 3 of 3 | Bake 326 Sep | Bake 219 Sep | Bake 112 Sep |
|---|---|---|---|
| Dough temp | 25°C | 22°C | 23°C |
| Bulk | 5h15m | 4h | 4h45m |
| Rise | 60% | 25% | 40% |
| Total | 17h17m | 16h2m | 16h47m |
Recipe book
Baker's math or grams.
Every recipe your way, scaled to any batch.
Weekend country loaf
Formula
Bread flour
100.0%470.9g
Levain100% HYD
20.0%104.7g
Water
70.0%314.0g
Salt
2.0%10.5g
Inside your levain · already counted above
Bread flour 52.4g · Water 52.4g
Starter care
Keep your starter thriving.
Feeding reminders, health checks and every feed logged.
Free tools & guides
Do the math. Learn the why.
Free sourdough calculators on the web, and guides on starters, autolyse and bulk fermentation.
Loaf card
Share your loaf.
They bake it too.
Your photo, your bake, your recipe. One tap opens it planned and ready.
Questions
Good to know.
What is SourdoughGuru?
SourdoughGuru is a sourdough baking app for iPhone and Android. It plans your bake backwards from the time you want bread, guides you through every step with timers, keeps your recipes, starter and bake logs in one place, and uses AI to analyse the crumb of your loaf.
How does the AI crumb analysis work?
Take a photo of your sliced loaf. SourdoughGuru marks problem areas such as tunneling, names the crumb structure it detects (for example a fool's crumb from under-fermentation) and gives a tip on what to change next bake.
Can it plan a bake around when I want my bread ready?
Yes. Pick the day and time you want fresh bread and SourdoughGuru works backwards, scheduling the levain build, autolyse, mix, bulk fermentation and the rest so the loaf is ready on time. Step timings are adjusted to your kitchen's temperature.
Can I use baker's percentages or grams?
Both. Every recipe can be shown as baker's percentages or as grams and scaled to any batch size. The flour and water inside your levain are shown separately, so nothing is counted twice.
Does it help me look after my sourdough starter?
Yes. Log every feed, get feeding reminders, and see a health check and a feeding chart for each starter.
Can I share my loaf or recipe?
Yes. Share a loaf card with your photo, hydration and recipe, or a recipe link. Anyone who taps it can open the recipe planned and ready in the app, and you can stop sharing at any time.
Is SourdoughGuru free?
SourdoughGuru is free to download on the App Store and Google Play. Some features are part of an optional Premium subscription, which is billed through the app store.
Is there a free sourdough calculator?
Yes. The website has two free tools: a sourdough and levain calculator that turns baker's percentages into gram weights, and a reverse calculator that turns a recipe's weights into baker's percentages.
Bake your best loaf yet.
Free to download on iPhone and Android.